New member needs help

[lurechunker]

I am new to the forum and asking for help. Our granddaughter plays basketball and I would like to photograph her. I kayak and would like to photograph birds. Is the EOS 760D the camera for me? Other? What lens or lenses? How can I protect my equipment form damage from saltwater? Thank you.

[Waddizzle]

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@TCampbell wrote:

I seem to recall that Canon deliberately slows the AF speed when the notice the extender is being used.  A slower AF speed is fairly normal.  There were a few reasons why it was a good idea to do that... I do not recall specifically what they were.

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I am pretty certain that you're correct.  I read about that, too, on one of Canon's web sites.  Don't quote me, but I think it was related to the reduction in incoming light, so they give the camera a brief moment of more time to gather liight.

[ebiggs1]

"...they give the camera a brief moment of more time to gather liight."

I really doubt that.  The camera doesn't gather (store up) light up to a certain point before it can AF.  It either has it or it doesn't.

[Waddizzle]

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@ebiggs1 wrote:

"...they give the camera a brief moment of more time to gather liight."

I really doubt that.  The camera doesn't gather (store up) light up to a certain point before it can AF.  It either has it or it doesn't.

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Right, it either has it or doesn't it.  One of the main reasons was related to the reduction in available light, of that I am almost certain.  Maybe, the camera performes a redundant calculation, which would take more time to process.

As far as gathering light goes, it is not instantaneous.  At some point the engineers must define a time period to collect a light sample.  For example, the sampling period could be 1/32000 of a second under normal use, or it could be reduced to 1/16000 with the extender, which could slow down the AF performance.

[ebiggs1]

"...the sampling period could be 1/32000 of a second under normal use, or it could be reduced to 1/16000 with the extender, which could slow down the AF performance."

I don't doubt that. We all know a t-con slows the AF down but the camera is not 'gathering' more light to make it happen. It has what it has.

[Waddizzle]

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@ebiggs1 wrote:

"...the sampling period could be 1/32000 of a second under normal use, or it could be reduced to 1/16000 with the extender, which could slow down the AF performance."

I don't doubt that. We all know a t-con slows the AF down but the camera is not 'gathering' more light to make it happen. It has what it has.

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Okay, Ernie.  You are correct.  Whatever you say.

[John_SD]

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@Waddizzle wrote:

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You should give it more time to learn.    

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There's no evidence of that ability. Hence, constant variations of "What should I buy next?"

[lurechunker]

Is there a trustworthy and affordable place to rent a Canon f/2.8 70-200 IS ll lens for a tryout?

[jrhoffman75]

Lensrentals.com is one place.

[lurechunker]

What paper and Canon printer should I buy for my pix?

[jrhoffman75]

Canon Pixma Pro-100. Get it on sale now for $130. Comes with some Canon paper. 

B&H may still have a $79 special. 

These prices are after rebate.